I have some red stars or sex link hens about 2.5yrs old, I have notice in the last week some of them are losing or picking the feathers out of the underneith side of their necks about 3" long, right over their throats. I think they are coming out of a molt because of downy soft white feathers coming in their red feathers, I havent seen any of them picking at themselves or others picking on them. Any ideas? they have plenty of dust to bathe in, dont think its lice or mites.